CDC, Florida probe possible Zika case from Miami mosquito

Associated Press

Published
3:54 pm PDT, Wednesday, July 20, 2016

FILE - In this Jan. 18, 2016, file photo, a female Aedes aegypti mosquito acquires a blood meal on the arm of a researcher at the Biomedical Sciences Institute in the Sao Paulo's University in Sao Paulo, Brazil. The CDC is working with Florida health officials to investigate what could be the first Zika infection from a mosquito bite in the continental United States. They said Tuesday, July 19, 2016, lab tests confirm a person in the Miami area is infected with the Zika virus, and there may not be any connection to someone traveling outside the country. (AP Photo/Andre Penner, File) less

FILE - In this Jan. 18, 2016, file photo, a female Aedes aegypti mosquito acquires a blood meal on the arm of a researcher at the Biomedical Sciences Institute in the Sao Paulo's University in Sao Paulo, ... more

Photo: Andre Penner, Associated Press

Photo: Andre Penner, Associated Press

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FILE - In this Jan. 18, 2016, file photo, a female Aedes aegypti mosquito acquires a blood meal on the arm of a researcher at the Biomedical Sciences Institute in the Sao Paulo's University in Sao Paulo, Brazil. The CDC is working with Florida health officials to investigate what could be the first Zika infection from a mosquito bite in the continental United States. They said Tuesday, July 19, 2016, lab tests confirm a person in the Miami area is infected with the Zika virus, and there may not be any connection to someone traveling outside the country. (AP Photo/Andre Penner, File) less

FILE - In this Jan. 18, 2016, file photo, a female Aedes aegypti mosquito acquires a blood meal on the arm of a researcher at the Biomedical Sciences Institute in the Sao Paulo's University in Sao Paulo, ... more

Photo: Andre Penner, Associated Press

CDC, Florida probe possible Zika case from Miami mosquito

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MIAMI — Health officials in Florida are investigating whether the Zika infection of a woman in the Miami area could be the first transmission of the virus from a mosquito bite in the continental United States.

Health officials said the case had no apparent links to recent travel outside the country. They did not immediately respond Wednesday to questions about ruling out other methods of transmission, such as sex.

The patient is an adult woman who lives in Miami-Dade County, according to a health official familiar with the case who wasn’t authorized to reveal details beyond the statements of the agencies involved, and thus spoke on condition of anonymity.

No other details about her case were released.

More than 1,300 Zika infections have been reported in the U.S., none involving bites from local mosquitoes; 14 of these were sexually transmitted and one lab worker was stuck with a contaminated needle.

Miami-Dade County has the most confirmed infections in Florida so far — 89, but all have involved someone who traveled outside the U.S. mainland to areas with Zika outbreaks, such as Latin America and the Caribbean.

Health officials predicted the virus would reach U.S. mosquitoes this summer and have mobilized to keep Zika from spreading beyond isolated clusters of cases.

According to a CDC response plan, health officials would want to see more than just one unexplained case before declaring that someone has been infected by a mosquito bite in the continental United States.

The plan suggests there should be two or more cases within a 1-mile area, in people who do not live together, who did not have sex with Zika-infected people, and who did not recently travel to countries with Zika outbreaks.

Evidence of the virus in mosquitoes captured in the same areas also might help investigators declare Zika is spreading, but short of that, it might be difficult to determine with certainty that mosquito transmission has occurred.

Mosquito control inspectors in Miami have been going door-to-door in the area under investigation since health authorities alerted them late last week, spraying to kill mosquitoes and emptying containers of the water they need to breed. If the virus is there, they want to keep it from spreading through more mosquito bites.